Having been nearly raw only since January, I have been exclusively raw now for 4 months.

As with when I ate aged cooked meats, when I eat aged raw meat, I tend to be mildly itchy in a few areas (neck, mid section) overnight. I don't notice any itchiness at time of consumption or in waking hours after eating. This only happens when I eat meat that has been aged for a few weeks. It's frustrating as I very much want to try very long aged meat. I also sometimes notice it with marrow that is 2 weeks aged.

When I eat lamb or beef that is less than a week old, I have no issues at all!

I understand the folks at PaleoMedicina in Hungary would theorize I have a leaky gut that needs to heal as it is permitting for particles into my bloodstream, perhaps causing this reaction. I have been eating only animal foods for over a year, and this is still an issue.

I think that vastly depends on the person, what you eat, how fast you can heal, how well ur lymphatic system works, how "damaged" you are and so forth. Impossible to say exactly, but I think a couple of months, to half a year to a year for sure. Mine was pretty bad could only eat 2 types of meat and I think 6 types of veggies, my gut was so fdk, but things are going uphill since on carnivore, but I still need to find certain answers. Once you have all that in place it will go much faster.

to add to the list: over eating, especially meat/protein, eating when not hungry, truly hungry, eating before going to bed, not exercising enough to stimulate adequate hunger, eating rancid or oxidized fats, drinking too much water with meals, or anything that will cause incomplete digestion which would then irritate intestinal linings.